first to the cabinet where they unveiled a statue of rosa parks. she became a hero of the civil rights movement when he refused to give up her seat in segregated alabama. it marks the first time that a black woman has received that honor. >>> rosa parks would have turned 100 years old this month. we do well by placing a statue of her here, but we can do no greater honor to her memory than to carry forward the power of her principle. >> shep: at the same time at the unveiling, justices were hearing argument surrounded the voting rights acted. part of that is states to ask the feds for permission before making changes to voting laws. you see the states highlighted here but one alabama county is challenging that part of the law arguing that it's no longer necessary. shannon is live at the supreme court. what is the counties' a argument to get a pass here? >> the voting rights acted was passed back in 1965 and the county koong has made. these specific counties and states that is covered by the obligations have come a long way and they shouldn't have to